Dell PowerVault 211S (SCSI) - Manual (Page 27)

support.dell.com Introduction 1-5
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The following SCSI hard-disk drive indicator lights are located at the top of each SCSI
hard-disk drive carrier and provide information on the drive in that bay (see Figure 1-1):
‡
The green drive online indicator lights when the hard-disk drive is receiving
power.
‡
The green drive activity indicator lights when data is being transferred to or
from the hard-disk drive.
‡
If a Dell PERC 2, Dell PERC 2/DC, Dell PERC 2/SC, or Dell PERC 3/DI host
adapter card is installed in the host computer, the amber drive fault indicator
lights if a disk failure is detected.
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1 Enclosure status indicators
2 Keylock
3 Lock bar
4 SCSI hard-disk drive indicators